
Because he abuses her and planned on raping her the night before her wedding. If there was anything there it was entirely one sided on his part. I ship Dany with YG, Bloodraven, Jon, anyone remotely Targy though lol.

Scrub grass and thorny bushes covered its lower slopes; higher up a jagged tangle of bare rock thrust steep and sudden into the sky. There, amidst broken boulders, razor-sharp ridges, and needle spires, Drogon made his lair. The air smelled of ash.
Two slavers dragged Jorah Mormont onto the block to take her place. The knight was naked but for a breechclout, his back raw from the whip, chains bound his wrists and ankles. Upon one cheek he bore a brand: a demon’s mask. The knight did not struggle. All the fight went out of him when he heard that his queen had wed, Tyrion realized.
- ADWD
take a shot every time a nice guy(tm) calls daario a douche
WHAT HAS HE EVER DONE WRONG?
Other than be a total bamf who runs a small army company at the age of like 29? Other than loyally serve Dany and protect her people? Other than try to take the bodies of dead children down so she wouldn’t need to see it? Asking for nothing back beyond their mutual work agreement? Other than not kissing her when she specifically told him not to like a certain other beloved character? Other than willingly go into captivity in order to keep the peace? Other than to help broker trade agreements? I’m sorry if I missed the scene where he betrayed Dany or belittled her. I’m sorry if other people missed the scene where he basically told Dany that while other people think women are good for nothing more than making babies he knows she is a $%^%^ Dragon Queen who can do whatever the hell she wants.
Sorry he’s successful and has confidence, all while being involved in a consensual adult relationship. None of that happens in ASOIAF-land so I get why it confuses people.
His outfits are weird? Khal Drogo had TINKLING BELLS IN HIS HAIR OK. Everyone’s outfits are weird to us. It’s a fantasy land.
So I went on gizoogle with some Daario quotes…
Guess what, muthafucka! Biatch found her muthafuckin ass thankin of Daario Naharis once again, Daario wit his stupid-ass gold tooth n’ trident beard, his strong handz restin on tha hiltz of his crazy-ass matched arakh n’ stiletto, hiltz wrought of gold up in the shape of naked dem hoes. I aint talkin’ bout chicken n’ gravy biatch. Da dizzle he took his fuckin leave of her, as her ass was biddin his ass farewell, he had brushed tha ballz of his cold-ass thumbs lightly across them, back n’ forth. I be jealouz of a sword hilt, her ass had realized, of dem hoes done cooked up of gold. Y’all KNOW dat shit, muthafucka! Sendin his ass ta tha Lamb Men had been wise. Right back up in yo muthafuckin ass. Biatch was a biatch, and Daario Naharis was not tha shiznit of kings.
——-
“Where should I escape to?”
“Into mah bed. Y’all KNOW dat shit, muthafucka! Into mah arms. Into mah heart.” Da hiltz of Daario’s arakh n’ stiletto were wrought up in tha shape of golden women, naked n’ wanton. I aint talkin’ bout chicken n’ gravy biatch yo. Dude brushed his cold-ass thumbs across em up in a way dat was remarkably obscene n’ smiled a wicked smile. Dany felt blood rushin ta her face. It was almost as if he was caressin her muthafuckin ass. Would he be thinkin me wanton too if I pulled his ass tha fuck into bed, biatch? Dude done cooked up her wanna be his wanton. I aint talkin’ bout chicken n’ gravy biatch. I should never peep his ass alone.
————-
“A hundred?” Daario chuckled all up in his thugged-out lil’ purple beard. Y’all KNOW dat shit, muthafucka! “I lied, sweet biatch. I aint talkin’ bout chicken n’ gravy biatch. It was a thousand. But never once a thugged-out dragon.” Biatch raised her lips ta his. “What is you waitin for?”

Theon found himself wondering if he should say a prayer. Will the old gods hear me if I do? They were not his gods, had never been his gods. He was ironborn, a son of Pyke, his god was the Drowned God of the islands… but Winterfell was long leagues from the sea. It had been a lifetime since any god had heard him. He did not know who he was, or what he was, why he was still alive, why he had ever been born.
“Theon,” a voice seemed to whisper.
His head snapped up. “Who said that?”; All he could see were the trees and the fog that covered them. The voice had been as faint as rustling leaves, as cold as hate. A god’s voice, or a ghost’s.
↳ A Dance with Dragons / A Song of Ice and Fire

That was how Khal Jhaqo found her, when half a hundred mounted warriors emerged from the drifting smoke.
Brazilian covers of A Song of Ice and Fire series; by Marc Simonetti
A Dance With Dragons, George R.R. Martin.
As requested by desdemonalovesmoon.

“Thousands of enemies. Thousands of wildlings.”
Thousands of people, Jon thought. Men, women, children. Anger rose inside him, but when he spoke his voice was quiet and cold. “Are you so blind, or is it that you do not wish to see? What do you think will happen when all these enemies are dead?”
Above the door the raven muttered, “Dead, dead, dead.”
“Let me tell you what will happen,” Jon said. “The dead will rise again, in their hundreds and their thousands. They will rise as wights, with black hands and pale blue eyes, and they will come for us.”
↳ A Dance with Dragons / A Song of Ice and Fire

Daario had only grown wilder since her wedding. Her peace did not please him, her marriage pleased him less(…) Daario was war and woe. Henceforth, she must keep him out of her bed, out of her heart, and out of her. If he did not betray her, he would master her. She did not know which of those she feared the most.

“I’m not the turncloak, he died at Winterfell. My name is Reek, It rhymes with freak.”

“Reek,” said the larger of the boys. “Your name is Reek. Remember?” He was the one with the torch. The smaller boy had the ring of iron keys.
Reek? Tears ran down his cheeks. “I remember. I do.” His mouth opened and closed.